Electronic Structures of type-I Dirac semimetal BaAl4

ORAL

Abstract

Topological non-trivial quantum states, such as topological insulators and Dirac/Wyle semimetals, have been attracting the community because of their rich novel physical properties and the wide range of possibilities of applications. Recently, BaAl4 has been proposed as a Dirac semimetal with type-I Dirac point protected by the symmetry of C4v with extremely large magnetoresistance. We will report a study of the electronic structure of this material from angle-resolved photoemission spectroscopy (ARPES) measurements, with focus on both the surface and bulk states. The semimetal nature of these states will be discussed.

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Presenters

  • Ryo Mori

    University of California, Berkeley and Lawrence Berkeley National Laboratory

Authors

  • Ryo Mori

    University of California, Berkeley and Lawrence Berkeley National Laboratory

  • Kefeng Wang

    University of Maryland, College Park, CNAM, Physics Department, University of Maryland, Univ of Maryland-College Park

  • Jonathan Ma

    University of California, Berkeley and Lawrence Berkeley National Laboratory

  • Jonathan Denlinger

    Advanced Light Source, Lawrence Berkeley National Laboratory, Lawrence Berkeley Natl Lab, Lawrence Berkeley National Laboratory

  • Johnpierre Paglione

    Center for Nanophysics and Advanced Materials , University of Maryland, CNAM, Department of Physics, University of Maryland, Univ of Maryland-College Park, Department of Physics, University of Maryland, CNAM, Department of Physics, Univ of Maryland-College Park, Univ of Maryland - College Park, College Park, MD 20742-4111, Univ of Maryland-College Park, Center for Nanophysics and Advanced Materials, Department of Physics, University of Maryland, Center for Nanophysics and Advanced Materials, University of Maryland, University of Maryland, College Park, University of Maryland

  • Alessandra Lanzara

    University of California Berkeley, University of California, Univ of California - Berkeley, Physics Department - University California, Berkeley, Materials Sciences Division - Lawrence Berkeley National Laboratory, Materials Sciences Division, Lawrence Berkeley National Laboratory, University of California, Berkeley and Lawrence Berkeley National Laboratory, Department of Physics, Univ of California - Berkeley, Univ. of California - Berkeley